Heat-treating furnace



July 14, 1925i. 1,545,485

' F. T. COPE HEAT TREATING FURNACE FiledNOy. 20, 192.4, 2 Sheets-Sheet 2llllllllL ihm/r T 50,06

@ @MM iv/@M @Hoc und@ Patented July 14, 1925.

UNITED STATES PATENT ,'oFFlcE.

FRANK T. COPE, OF SALEM, OHIO, ASSIGNOR TO lTHE ELECTRIC FURNACECOMPANY,

OF SALEM, OHIO, A CORPORATION ,OF OHIO (INCORPORATED 1923).

HEAT-Tanzanite nommen `Application lled November 20, 1924. Serial No.751,024.

'To all lwhom it may concern:

Be it known that I, FRANK T. COPE, a`y

cially adapted for heat treating small arti-l cles such as automobilegears and the like, and the objects of the improvement are to provide acontinuous furnace in which the articles to be treated are suspended in`the heating chamber from blocks slidably carried in a slot in the roofof the furnace and overlapping to keep the slot sealed at all times,means being provided for intermittently or continuously moving theblocks forward through the furnace, the parts be- -ing so arranged thatas each article is properly heat treated, it is carried out of thedischarge end of the furnace.

The above and other objects may be attained by constructing the furnacein the manner illustrated in the accompanying drawings, in which- YFigure 1 is a vertical, longitudinal section through a furnace embodyingthe invention; y

Fig. 2, a transverse sectional view of the furnace;

Fig. 3, an end view of the same; and

Fig. 4, a detached isometric detail of one of the movable blocks fromwhich the articles are supported.

Similar numerals refer to similar parts throughout the drawings.

The furnace is indicated generally at l, and may be of any lengthnecessary to produce the desired heat treatment. The heating chamber 2of the furnace may be heated electrically or by any other well knownmeans,'and need only be of sucient cross sectional area to accommodatethe 'articles to be passed therethrough.

Anentrance or charging opening 3 1s provided at one end of the heatingchamber, and a similar discharge opening 4 at the opposite end. Althoughdoors may be provided for'these openings and arranged to beautomatically opened and closed to permit athe entrance and exit of thearticles under treatment, it it not thought necessary to illustrate thesame', and for the purpose of this invention, it may be assumed that thedoors are dispensed with. 4

The roof 5 of the furnace is provided with a central, longitudinal slot6, which may be reinforced as by the angle irons 7. The artlcles to beheat treated, which in the present case are shown as automobile gears,indlcated at 8, are suspended upon hooks 9 carried by the blocks 10,provided with the overlapping shoulders 11 at theirv ends, and havingthe depending ribs 12 arranged to slidably fit within'the slot 6, a lug13 being formed upon the upper side of each block. These blocks arelocated continuously along the slot 6 throughout the entire length ofthe furnace, and thus eflectually seal the slot and prevent loss of heatthrough the same. The track members 7 are preferably extended for adistance beyond each end of the furnace, for the purpose of charging anddischarging.

In order to intermittently move the blocks forward along the slot 6, areciprocating push rod 14 is provided and arranged to be continuouslyreciprocated in any well .known manner.

One or more pawls 15 are pivotally mounted upon the rod 14 and inclinedforward and downward to engage the lugs 13 of the sliding blocks,whereby with each reciprocation of the rod, the pawl 15 will ridebackward over one or more blocks and then lengage with one of the lugs13 to carry the gears or other articles upon the hooks 9 as.

they near the charging end of the furnace,

while a. second operator may remove the treated articles from the hooksas they emerge from the discharge end of the furnace, the blocks withthe empty hooks continuing to travel back to the charging position.

It will be evident that instead of the intermittent movement given tothe blocks by the reciprocating push rod, any well known mechanism ma beprovided for continuously moving t e blocks forward along the roof ofthe furnace.

Although a straight furnace is illusmated, ,it should be understood thatthe 'invention is apv licable to a rotary furnace, b

1. A furnace provided withl a 'slot in its.

roof, abutting blocks provided with article supporting rods dependingthrough said spt, and means for moving the blocks along t e slot.

2. A lfurnace provided with a slot inits roof, overlapping blocksprovided with article supporting rods depending through said slot, andmeans for moving the blocks along the slot.

3. A furnace having a longitudinal slot in its roof, blocks providedwith ribs slidably mounted in the slot, article supporting rods dependinfrom the blocks, and

- means for moving t e blocks forward along the'slot. Y v

4. A furnace having a longitudinal slot in its roof, overlapping blocksprovided with ribs slidably mounted in theslot, article supporting:rods'depending from the blocks, and means for moving the blocks forwardalong the slot.v

5. A furnace having a longitudinal slot slot, lugs upon the upper si sof the blocks,

and means for en aglng said lugs to move the blocks forwar along theslot.

6. A furnace havin a longitudinal slot in its'roof, overlapping blocksprovided with article supporting rods depending through said slot, lugsupon th upper sides of the blocks, and means for en aging said 1 to movethe blocks forwar lalong the s ot.

7. A furnace having a longitudinal slot in its roof, blocks providedwith article supporting rods depending through said slot, lugs'upon theu per. sides of the blocks, a reciprocating pus for engagementl withsaid lugs, and means for engaging said lugs to move the blocks `forwardalong the slot.

8. A furnace provlded with a slot in its roof, article supporting rodsdepending through said slot, and means for moving the rods forwardthrough th'e slot and means for kping the slot closed as the rods aremov therethrough.

In testimony that I claim the above, I have hereunto subscribed my name.

i j FRANK T. corn.

rod having a pawl.

